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    <title>Document</title>
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    <script>
        // 编写函数has(arr , 60) 判断数组中是否存在60这个元素，返回布尔类型
        var arr = [1, 2, 3, 60]
        var arr2 = [1, 2, 3]

        function has(arr,num){
           falg=false
            for(var i=0; i<arr.length; i++){
                if(arr[i]==num){
                    falg= true
                }
            }
            if(falg==true){
                    return true
                }else{
                    return false
                }
        }
        var s=has(arr,60)
        console.log(s)
        var x=has(arr2,60)
        console.log(x)
    </script>
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